[PATCH] Have Power use add_active_range() and free_area_init_nodes()

Size zones and holes in an architecture independent manner for Power.

[judith@osdl.org: build fix]
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Andi Kleen <ak@muc.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "Keith Mannthey" <kmannth@gmail.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 16 insertions, 143 deletions

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 6c0f1c7d83e5..43c272075e1a 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -39,96 +39,6 @@ static bootmem_data_t __initdata plat_node_bdata[MAX_NUMNODES];
 static int min_common_depth;
 static int n_mem_addr_cells, n_mem_size_cells;
 
-/*
- * We need somewhere to store start/end/node for each region until we have
- * allocated the real node_data structures.
- */
-#define MAX_REGIONS     (MAX_LMB_REGIONS*2)
-static struct {
-        unsigned long start_pfn;
-        unsigned long end_pfn;
-        int nid;
-} init_node_data[MAX_REGIONS] __initdata;
-
-int __init early_pfn_to_nid(unsigned long pfn)
-{
-        unsigned int i;
-
-        for (i = 0; init_node_data[i].end_pfn; i++) {
-                unsigned long start_pfn = init_node_data[i].start_pfn;
-                unsigned long end_pfn = init_node_data[i].end_pfn;
-
-                if ((start_pfn <= pfn) && (pfn < end_pfn))
-                        return init_node_data[i].nid;
-        }
-
-        return -1;
-}
-
-void __init add_region(unsigned int nid, unsigned long start_pfn,
-                       unsigned long pages)
-{
-        unsigned int i;
-
-        dbg("add_region nid %d start_pfn 0x%lx pages 0x%lx\n",
-                nid, start_pfn, pages);
-
-        for (i = 0; init_node_data[i].end_pfn; i++) {
-                if (init_node_data[i].nid != nid)
-                        continue;
-                if (init_node_data[i].end_pfn == start_pfn) {
-                        init_node_data[i].end_pfn += pages;
-                        return;
-                }
-                if (init_node_data[i].start_pfn == (start_pfn + pages)) {
-                        init_node_data[i].start_pfn -= pages;
-                        return;
-                }
-        }
-
-        /*
-         * Leave last entry NULL so we dont iterate off the end (we use
-         * entry.end_pfn to terminate the walk).
-         */
-        if (i >= (MAX_REGIONS - 1)) {
-                printk(KERN_ERR "WARNING: too many memory regions in "
-                                "numa code, truncating\n");
-                return;
-        }
-
-        init_node_data[i].start_pfn = start_pfn;
-        init_node_data[i].end_pfn = start_pfn + pages;
-        init_node_data[i].nid = nid;
-}
-
-/* We assume init_node_data has no overlapping regions */
-void __init get_region(unsigned int nid, unsigned long *start_pfn,
-                       unsigned long *end_pfn, unsigned long *pages_present)
-{
-        unsigned int i;
-
-        *start_pfn = -1UL;
-        *end_pfn = *pages_present = 0;
-
-        for (i = 0; init_node_data[i].end_pfn; i++) {
-                if (init_node_data[i].nid != nid)
-                        continue;
-
-                *pages_present += init_node_data[i].end_pfn -
-                        init_node_data[i].start_pfn;
-
-                if (init_node_data[i].start_pfn < *start_pfn)
-                        *start_pfn = init_node_data[i].start_pfn;
-
-                if (init_node_data[i].end_pfn > *end_pfn)
-                        *end_pfn = init_node_data[i].end_pfn;
-        }
-
-        /* We didnt find a matching region, return start/end as 0 */
-        if (*start_pfn == -1UL)
-                *start_pfn = 0;
-}
-
 static void __cpuinit map_cpu_to_node(int cpu, int node)
 {
         numa_cpu_lookup_table[cpu] = node;
@@ -468,8 +378,8 @@ new_range:
                                 continue;
                 }
 
-                add_region(nid, start >> PAGE_SHIFT,
-                           size >> PAGE_SHIFT);
+                add_active_range(nid, start >> PAGE_SHIFT,
+                                (start >> PAGE_SHIFT) + (size >> PAGE_SHIFT));
 
                 if (--ranges)
                         goto new_range;
@@ -482,6 +392,7 @@ static void __init setup_nonnuma(void)
 {
         unsigned long top_of_ram = lmb_end_of_DRAM();
         unsigned long total_ram = lmb_phys_mem_size();
+        unsigned long start_pfn, end_pfn;
         unsigned int i;
 
         printk(KERN_DEBUG "Top of RAM: 0x%lx, Total RAM: 0x%lx\n",
@@ -489,9 +400,11 @@ static void __init setup_nonnuma(void)
         printk(KERN_DEBUG "Memory hole size: %ldMB\n",
                (top_of_ram - total_ram) >> 20);
 
-        for (i = 0; i < lmb.memory.cnt; ++i)
-                add_region(0, lmb.memory.region[i].base >> PAGE_SHIFT,
-                           lmb_size_pages(&lmb.memory, i));
+        for (i = 0; i < lmb.memory.cnt; ++i) {
+                start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
+                end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
+                add_active_range(0, start_pfn, end_pfn);
+        }
         node_set_online(0);
 }
 
@@ -630,11 +543,11 @@ void __init do_init_bootmem(void)
                           (void *)(unsigned long)boot_cpuid);
 
         for_each_online_node(nid) {
-                unsigned long start_pfn, end_pfn, pages_present;
+                unsigned long start_pfn, end_pfn;
                 unsigned long bootmem_paddr;
                 unsigned long bootmap_pages;
 
-                get_region(nid, &start_pfn, &end_pfn, &pages_present);
+                get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
 
                 /* Allocate the node structure node local if possible */
                 NODE_DATA(nid) = careful_allocation(nid,
@@ -667,19 +580,7 @@ void __init do_init_bootmem(void)
                 init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT,
                                   start_pfn, end_pfn);
 
-                /* Add free regions on this node */
-                for (i = 0; init_node_data[i].end_pfn; i++) {
-                        unsigned long start, end;
-
-                        if (init_node_data[i].nid != nid)
-                                continue;
-
-                        start = init_node_data[i].start_pfn << PAGE_SHIFT;
-                        end = init_node_data[i].end_pfn << PAGE_SHIFT;
-
-                        dbg("free_bootmem %lx %lx\n", start, end - start);
-                        free_bootmem_node(NODE_DATA(nid), start, end - start);
-                }
+                free_bootmem_with_active_regions(nid, end_pfn);
 
                 /* Mark reserved regions on this node */
                 for (i = 0; i < lmb.reserved.cnt; i++) {
@@ -710,44 +611,16 @@ void __init do_init_bootmem(void)
                         }
                 }
 
-                /* Add regions into sparsemem */
-                for (i = 0; init_node_data[i].end_pfn; i++) {
-                        unsigned long start, end;
-
-                        if (init_node_data[i].nid != nid)
-                                continue;
-
-                        start = init_node_data[i].start_pfn;
-                        end = init_node_data[i].end_pfn;
-
-                        memory_present(nid, start, end);
-                }
+                sparse_memory_present_with_active_regions(nid);
         }
 }
 
 void __init paging_init(void)
 {
-        unsigned long zones_size[MAX_NR_ZONES];
-        unsigned long zholes_size[MAX_NR_ZONES];
-        int nid;
-
-        memset(zones_size, 0, sizeof(zones_size));
-        memset(zholes_size, 0, sizeof(zholes_size));
-
-        for_each_online_node(nid) {
-                unsigned long start_pfn, end_pfn, pages_present;
-
-                get_region(nid, &start_pfn, &end_pfn, &pages_present);
-
-                zones_size[ZONE_DMA] = end_pfn - start_pfn;
-                zholes_size[ZONE_DMA] = zones_size[ZONE_DMA] - pages_present;
-
-                dbg("free_area_init node %d %lx %lx (hole: %lx)\n", nid,
-                    zones_size[ZONE_DMA], start_pfn, zholes_size[ZONE_DMA]);
-
-                free_area_init_node(nid, NODE_DATA(nid), zones_size, start_pfn,
-                                    zholes_size);
-        }
+        unsigned long max_zone_pfns[MAX_NR_ZONES] = {
+                                lmb_end_of_DRAM() >> PAGE_SHIFT
+        };
+        free_area_init_nodes(max_zone_pfns);
 }
 
 static int __init early_numa(char *p)